Door-locking burglar-alarm



No. 625,867. Patented May 3o, |899.

A. M. BENSON.

noon Lncxma Bussum ALARM.

(Application filed May 23, 189B.)

(No Model.)

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NiTl-:D STATES! PATENT OFFICE.

ARZA M. BENSON, OF CLEVELAND, OHIO.

Doon-LOCKING BuR'eLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 625,867, dated May 30,`1899.

Application iiled'May 23, 1898. Serial No. 631,413; (No model.)` v

To '2r/ZZ whom t may concern:

i Be it known that I, ARZA M. BENSON, a citizen of the United States,and a resident of Cleveland, county of Cuyahoga, and State of Ohio, haveinvented a new and useful Improvement in Door-Lockin g Burglar-Alarms,of which the following is a specification, the principle of theinvention being herein explained and the best mode in which I havecontemplated applying that principle, so as to distinguish it from otherinventions.

My invention has for its object a combined door or window lock andburglar-alarm.

The annexed drawings and the following description set forth in det-ailcertain mechanism embodying the invention, such disclosed meansconstituting but one of various mechanical forms in which the principleof the invention may be used.

In said annexed drawings,Figure I is an elevational view of the alarm assecured to a doorcasing. Fig. II is a horizontal sectional View througha door and door-casin g, the alarm being shown in plan view.

Adoor-casingAis suitably cut away to permit the burglar-alarm B to besecured thereto by means of the usual screws, so as not to interferewiththe opening of the door C.

The alarm consists of a base, in which is pivoted the bifurcatedlever-support l?. Lever D is pivoted in the bifurcated portion of saidsupport and is provided at its forward portion with the slotted endd,the rear portion of the lever extending, when in operative position,beyond the easing, so as to engage with the door C. A spring supportingportion e extends outwardly from the base of the alarm, and to this ismovably secured the spring E, that pivots on the screw e', that holds itin place. Said spring is provided near its free extremity with a lug c2,and the free extremity of the spring is adapted to slip into the slotformed in the extremity of lever D. A cartridge-support F is formedintegral with the base of the alarm and has an opening in i whichcartridge f may be placed. Somewhat relnoved from the cartridge-openingis a wall f', which is adapted to receive any discharge from thecartridge.

By locating the spring between the cartridge-support and the base andthe lever be'- ftween the spring and base a compact and neat arrangementof parts is secured.

The operation of the device is as followsi A cartridge is placed in thecartridge-opening, the lever D is swung around until its rear extremitycrosses the path of the opening door, the free end of the spring isinserted in the slot of the lever, and the device is ready for use. Ifthe door is forced open while the device is in operative position, theleverD is moved from the position shown in full lines in Fig. II to theposition shown in dotted lines in Fig. II, and the spring is releasedfrom engagement in the slot, so that the lug e2 is brought in violentcontact with the cartridge and the cartridge is exploded,

and permitting the door to be freely opened or closedwithout engagingwith said lever. This is accomplished by turning the leversupport on itspivot and turning the spring on 4the screw e.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change' being made as regards themechanism herein disclosed, provided the means covered by any one of thefollowing claims be employed. y

I therefore particularly-point out and 'distinctly claim as myinventionl. The combination of a cartridge-support, a lever, aspring-support, a spring pivoted upon said spring-support, a leverpivoted upon a base, said spring-support secured to or integral withsaid base, said spring located between the cartridge-support and thebase and said lever located between said spring and base, substantiallyas set forth.

- 2. The combination of a cartridge-support,

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a lever, a, spring-support, a spring pvoted gage the end of thespringysubstantially as upon said spring-support, and aleverpivoted setforth. upon at base, said spring-support secured to Signed by me this19thv day of May, 1898.

or in tegi'al with said base, said sprn g located A. M. BENSON. 5between the cartridge-support and base, the Attest:

lever located between the spring and base and D. T. DAVIES,

formed with an end slot and adapted to en- J. C. TURNERA

